I have a 91 Loyale that has working air conditioning and I would like to get it in my 89 GL that didn't come with A/C. From what I can gather the Loyale and GL were pretty much the same so I feel like everything should swap right over. But I want to ask and see if it's doable before going through and tearing it all out. Anyone done this before?

It would be a pretty big project, but it should be possible.

Well I have the engine completely out right now anyways, so I guess what better time than now right? Thanks for the input!

I did the swap in an 85 wagon 10 or more years ago. My advice is to swap the entire dash as a unit. The under-the-hood work is pretty basic. 

Dang, is it just way easier that way? Or is that really the only way to go about it?

 

I was hoping to stick with my original dash as the parts car is a different color. Oh well, I'm already taking the tops of the door panels and switching them. It's going to be a multicolor interior now. Maybe I'll take the time while it's all apart and paint it something new.

You can keep the dash skin, just might need to swap the wiring behind it (I don't know if your cars came prewired for AC or not, ours didn't).

You need to pull the dash out to swap in the A/C unit anyway. Can be done without it (Subaru Oz did dealer fit A/C this way for RHD), but it's heaps easier with the dash out of the way.